Weifang City Center Drainage System Rain Sewage Diversion Modification Technology Research

In recent years the rapid development of Weifang City, accelerating the urbanization process, the general goal of city development is sustainable and coordinated development and livable city construction. In recent years the rapid development momentum, population, economy, urban construction area increased. There are many problems in current drainage system exposed soon:One is the drainage facilities is not perfect, low standard, no construction of rain sewage discharge facilities corresponding parts, the rain water runoff, untreated sewage directly discharged into the river. Two is the drainage of rainwater and sewage pipes, sewage access to water main pipe leading to the sewage discharged into the river, pollution of water environment; water pipeline access sewage main pipeline caused by the rainy season the impact of sewage treatment plant, posed a serious security risk. Three rainy city water and serious waterlogging, city flood control safety is threatened. Four is due to imperfect network, sewage treatment plant sewage collection rate is low. The existing municipal drainage infrastructure is very backward, far can not meet the need of the operation and development of the city.Based on the analysis of current situation of center city rain sewage drainage system, analysis of the drainage standard of drainage facilities, find out main problems.According to the situation in Weifang City Road and road planning, combined with the requirements of the drainage planning of Weifang City, making the scheme of the system transformation of central urban area drainage. Through to redraw confluence, the existing rainwater, sewage trunk, are preserved and utilized fully, the maximum saving project investment. Combined with the specific circumstances of Weifang City, analyzes the comprehensive application of different drainage system, different combined application system reform scheme, trenchless technology engineering measures and new materials in the transformation of urban drainage system in the center.Due to the center of the city drainage system of rain sewage diversion transformation is not standardized and mature system theory, this study through the analysis and study of the diversion of drainage system of the downtown of Weifang, with reference to the other similar project in china.